Official investigation launched after officers pursue 70-year-old stopped for not wearing a seatbelt and drag him from his car

A police video shows officers chasing the car and smashing a window with a baton Link to this video

A 70-year-old stopped because he was not wearing a seatbelt ended up co-starring in a scene worthy of the cop drama parody Hot Fuzz, with police in a quiet country lane forcibly stopping his Range Rover after a 30mph chase, leaping on to the bonnet and smashing a window before dragging him from the driver's seat.

The police video shows the chase, with sirens blaring as police and suspect drive neatly along pretty country roads, keeping well in to the correct side of the road and within the speed limit. At one point a police voice is heard calmly saying: "No change, no change, four zero or 30 miles an hour, still on the right side of the road, quite happy to continue."

The scene changes dramatically when the Range Rover is stopped, apparently by a stinger device laid across the road by police from another unit, who also flag down the car on foot.

Immediately, one policeman leaps from the following car, runs to the Range Rover and tries to smash the window with a baton, while a man from the other unit leaps on to the bonnet and a voice from inside the car can faintly be heard repeating: "Get off, get off!" A passing motorist stops to see what is happening but is ordered back into his car by the police. Eventually the pensioner is dragged by the arm out of his car.